EP0694350A1 - Transfer arrangement for presses - Google Patents

Transfer arrangement for presses Download PDF

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Publication number
EP0694350A1
EP0694350A1 EP95810446A EP95810446A EP0694350A1 EP 0694350 A1 EP0694350 A1 EP 0694350A1 EP 95810446 A EP95810446 A EP 95810446A EP 95810446 A EP95810446 A EP 95810446A EP 0694350 A1 EP0694350 A1 EP 0694350A1
Authority
EP
European Patent Office
Prior art keywords
grippers
workpiece
transport
workpieces
arrangement according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95810446A
Other languages
German (de)
French (fr)
Other versions
EP0694350B1 (en
Inventor
Theo Egolf
Urs Flühmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Styner and Bienz AG
Original Assignee
Styner and Bienz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Styner and Bienz AG filed Critical Styner and Bienz AG
Publication of EP0694350A1 publication Critical patent/EP0694350A1/en
Application granted granted Critical
Publication of EP0694350B1 publication Critical patent/EP0694350B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars

Definitions

  • the present invention relates to a transfer arrangement on a press for the gradual transport of workpieces through processing stations of a tool, with transport bars arranged on the side of the tool, which are equipped with grippers for workpieces and can be cyclically moved back and forth in the longitudinal and transverse directions.
  • the transport bars perform a closed rectangular movement per work cycle by advancing a number of detected workpieces to the next station of the tool in a first cycle, then moving them laterally away from the tool in the longitudinal direction and moving them back to the tool to capture the workpieces.
  • the aim of the present invention is to simplify the transfer arrangement considerably.
  • This goal is achieved in that at least some of the grippers are provided with lifting magnets in order to lift the workpiece during transport from one processing station to the next. Thanks to this very simple measure, the disadvantageous vertical movement of the transport rods and grippers is eliminated.
  • the grippers can be rigid and can be rigidly connected to the transport rods. They only need to be provided with orientation means, for example V-shaped end faces or orientation pins, which secure the workpieces in the desired position during the lifting by the magnets and during the transfer of the workpieces from one processing station to the next.
  • Figure 1 shows a section of the transfer system of a press, with two transport rods 1, on which two rigid grippers 2 and 3 are fixedly mounted. These grippers are used in the manner described at the outset to grasp and transport a workpiece 4, namely a deep-drawn part with a raised central part 4a and an annular flange 4b.
  • the two grippers 2 and 3 have V-shaped end faces 5 which, in the closed position shown in FIG. 1, have the slightest mutual distance between the two grippers 2 and 3 Apply play to the raised middle part 4a of the workpiece 4 and orient it in a certain position.
  • the two grippers are each equipped with two permanent magnets 6, the lower end faces of which are flush with the undersides of the grippers 2 and 3.
  • a sensor 7 for presence control is mounted in a slot of the gripper 3 and is connected to the press control via a cable 8.
  • the transport rods 1 with the grippers 2 and 3 are moved from a spread position into the closed or approximated position shown in FIGS. 1 and 2.
  • the grippers move inward over the flange 4b of the workpiece and orient the workpiece with their end faces 5 against lateral displacement.
  • the orientation takes place with a certain game, i. H. the workpiece can move practically freely between the grippers in the vertical direction.
  • the magnets 6 now lying over the flange 4b now lift the ferromagnetic workpiece into the raised position shown in solid lines in FIG. 2, into which the workpiece is then brought into the next processing station.
  • the sensor 7 monitors the presence of a workpiece and, in the absence of a workpiece, causes the press to stop immediately.
  • the illustrated embodiment shows the possibility of how deep-drawn workpieces can be oriented and raised. Flatter workpieces cannot be oriented in this way.
  • the grippers 2 and 3 can be provided with orientation pins which either lie against the edge of the workpiece from the outside or in Intervene in the orientation holes of the workpiece.
  • Orientation pins 9 of this type which serve to orient the workpiece by abutting against the flange 4b from the outside, are shown in dash-dotted lines in FIG.
  • Orientation pins could also be provided, however, which penetrate the orientation holes of the workpiece when the workpiece is lifted by the magnets 6.

Abstract

The transport bars (1) are located on the side of the tool, and the grippers (2, 3) for the workpieces (4) run along the bars. The grippers can be moved cyclically forward and backward in the longitudinal and lateral directions. Magnets (6) are located in the grippers to lift the work pieces from one work station to the next during transportation. <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Transferanordnung an einer Presse zum schrittweisen Transport von Werkstücken durch Bearbeitungsstationen eines Werkzeuges, mit seitlich des Werkzeuges angeordneten Transportstangen, die mit Greifern für Werkstücke besetzt und zyklisch in Längs- und Querrichtung hin- und herbewegbar sind. Die Transportstangen führen pro Arbeitszyklus eine geschlossene rechteckige Bewegung aus, indem sie in einem ersten Takt eine Anzahl erfasster Werkstücke zur nächsten Station des Werkzeuges vorschieben, dann seitlich vom Werkzeug entfernt in Längsrichtung zurückgeführt und zum Erfassen der Werkstücke wieder zum Werkzeug hin bewegt werden. Es treten hierbei erhebliche Beschleunigungen und Verzögerungen und entsprechend hohe Massenkräfte auf, so dass die Arbeitskadenz der Presse durch Festigkeit und Stabilität der Transferanordnung begrenzt ist. Verhältnismässig enge Grenzen sind deshalb gesetzt, weil jede Erhöhung der Festigkeit und mechanischen Stabilität der Transportstangen gegen Deformation zu einer Gewichtserhöhung führt, die ihrerseits eine Erhöhung der Massenkräfte bewirkt.The present invention relates to a transfer arrangement on a press for the gradual transport of workpieces through processing stations of a tool, with transport bars arranged on the side of the tool, which are equipped with grippers for workpieces and can be cyclically moved back and forth in the longitudinal and transverse directions. The transport bars perform a closed rectangular movement per work cycle by advancing a number of detected workpieces to the next station of the tool in a first cycle, then moving them laterally away from the tool in the longitudinal direction and moving them back to the tool to capture the workpieces. Considerable accelerations and decelerations and correspondingly high mass forces occur, so that the working cadence of the press is limited by the strength and stability of the transfer arrangement. Relatively narrow limits are set because any increase in the strength and mechanical stability of the transport rods against deformation leads to an increase in weight, which in turn causes an increase in the inertial forces.

Um einen störungsfreien Transfer der Werkstücke sicherzustellen, wird der oben erwähnten horizontalen Transferbewegung noch eine vertikale Bewegung überlagert, indem die Transportstangen mit den Greifern jeweils nach dem Erfassen der Werkstücke etwas angehoben werden, damit die erfassten Werkstücke sicher in die nächste Station des Werkzeugs einlaufen können. Ohne diese Vertikalbewegung besteht die Gefahr, dass Werkstücke beim Einlaufen in eine nächste Station gegen Teile derselben anschlagen könnten. Diese zusätzliche Vertikalbewegung der Transportstangen und Greifer bringt eine erhebliche Verteuerung sowie eine Erhöhung der trägen Massen mit sich.In order to ensure trouble-free transfer of the workpieces, a vertical movement is superimposed on the horizontal transfer movement mentioned above, in that the transport rods with the grippers are raised slightly each time after the workpieces have been gripped, so that the gripped workpieces can safely run into the next station of the tool. Without this vertical movement, there is a risk that workpieces could hit parts of the same when entering a next station. This additional vertical movement of the transport bars and grippers results in a considerable increase in price and an increase in the inert masses.

Ziel vorliegender Erfindung ist es, die Transferanordnung erheblich zu vereinfachen. Dieses Ziel wird dadurch erreicht, dass mindestens ein Teil der Greifer mit Hubmagneten versehen sind, um das Werkstück beim Transport aus einer Bearbeitungsstation zur nächsten anzuheben. Dank dieser sehr einfachen Massnahme fällt die nachteilige Vertikalbewegung der Transportstangen und Greifer weg. Ein weiterer Vorteil besteht darin, dass die Greifer starr ausgeführt und starr mit den Transportstangen verbunden sein können. Sie brauchen lediglich mit Orientierungsmitteln, beispielsweise V-förmigen Stirnflächen oder Orientierungsstiften, versehen zu sein, welche die Werkstücke während des Anhebens durch die Magnete und während des Transfers der Werkstücke aus einer Bearbeitungsstation in die nächste in der gewünschten Lage sichern.The aim of the present invention is to simplify the transfer arrangement considerably. This goal is achieved in that at least some of the grippers are provided with lifting magnets in order to lift the workpiece during transport from one processing station to the next. Thanks to this very simple measure, the disadvantageous vertical movement of the transport rods and grippers is eliminated. Another advantage is that the grippers can be rigid and can be rigidly connected to the transport rods. They only need to be provided with orientation means, for example V-shaped end faces or orientation pins, which secure the workpieces in the desired position during the lifting by the magnets and during the transfer of the workpieces from one processing station to the next.

Die Erfindung wird nun anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.

Figur 1
zeigt eine Draufsicht auf ein Greiferpaar und ein Werkstück, und
Figur 2
zeigt einen Teilschnitt durch das Greiferpaar und das Werkstück.
The invention will now be explained in more detail with reference to an embodiment shown in the drawing.
Figure 1
shows a plan view of a pair of grippers and a workpiece, and
Figure 2
shows a partial section through the pair of grippers and the workpiece.

Figur 1 zeigt einen Ausschnitt aus dem Transfersystem einer Presse, mit zwei Transportstangen 1, an welchen zwei starre Greifer 2 und 3 fest montiert sind. Diese Greifer dienen in der eingangs beschriebenen Weise zum Erfassen und Transportieren eines Werkstücks 4, nämlich einem tiefgezogenen Teil mit einem erhöhten Mittelteil 4a und einem Ringflansch 4b. Die beiden Greifer 2 und 3 weisen V-förmige Stirnflächen 5 auf, welche bei der in Figur 1 dargestellten, geschlossenen Stellung geringsten gegenseitigen Abstands der beiden Greifer 2 und 3 mit etwas Spiel am erhöhten Mittelteil 4a des Werkstücks 4 anliegen und dasselbe in einer bestimmten Lage orientieren. Die beiden Greifer sind mit je zwei Permanentmagneten 6 besetzt, deren untere Stirnflächen bündig sind mit den Unterseiten der Greifer 2 und 3. In einem Schlitz des Greifers 3 ist ein Sensor 7 zur Anwesenheitskontrolle montiert, der über ein Kabel 8 mit der Pressensteuerung verbunden ist.Figure 1 shows a section of the transfer system of a press, with two transport rods 1, on which two rigid grippers 2 and 3 are fixedly mounted. These grippers are used in the manner described at the outset to grasp and transport a workpiece 4, namely a deep-drawn part with a raised central part 4a and an annular flange 4b. The two grippers 2 and 3 have V-shaped end faces 5 which, in the closed position shown in FIG. 1, have the slightest mutual distance between the two grippers 2 and 3 Apply play to the raised middle part 4a of the workpiece 4 and orient it in a certain position. The two grippers are each equipped with two permanent magnets 6, the lower end faces of which are flush with the undersides of the grippers 2 and 3. A sensor 7 for presence control is mounted in a slot of the gripper 3 and is connected to the press control via a cable 8.

Es ist angenommen, das Werkstück befinde sich nach erfolgter Bearbeitung in einer Bearbeitungsstation in einer in Figur 2 in gestrichelten Linien angedeuteten Lage. Zum Erfassen und Weitertransportieren des Werkstücks werden die Transporstangen 1 mit den Greifern 2 und 3 aus einer gespreizten Stellung in die in Figur 1 und 2 dargestellte, geschlossene oder angenäherte Stellung verschoben. Dabei bewegen sich die Greifer, wie Figur 2 zeigt, über dem Flansch 4b des Werkstücks nach innen und orientieren das Werkstück mit ihren Stirnflächen 5 gegen seitliche Verschiebung. Die Orientierung erfolgt jedoch mit einem gewissen Spiel, d. h. das Werkstück kann sich zwischen den Greifern in vertikaler Richtung praktisch frei bewegen. Die nun über dem Flansch 4b liegenden Magnete 6 heben nun das ferromagnetische Werkstück in die in Figur 2 in ausgezogenen Linien dargestellte angehobene Lage, in welche dann das Werkstück in die nächste Bearbeitungsstation gebracht wird. Der Sensor 7 überwacht jeweils die Anwesenheit eines Werkstücks und bewirkt beim Fehlen eines Werkstücks das sofortige Anhalten der Presse.It is assumed that the workpiece is in a processing station in a position indicated by broken lines in FIG. 2 after processing. For gripping and further transport of the workpiece, the transport rods 1 with the grippers 2 and 3 are moved from a spread position into the closed or approximated position shown in FIGS. 1 and 2. As shown in FIG. 2, the grippers move inward over the flange 4b of the workpiece and orient the workpiece with their end faces 5 against lateral displacement. However, the orientation takes place with a certain game, i. H. the workpiece can move practically freely between the grippers in the vertical direction. The magnets 6 now lying over the flange 4b now lift the ferromagnetic workpiece into the raised position shown in solid lines in FIG. 2, into which the workpiece is then brought into the next processing station. The sensor 7 monitors the presence of a workpiece and, in the absence of a workpiece, causes the press to stop immediately.

Das dargestellte Ausführungsbeispiel zeigt die Möglichkeit, wie tiefgezogene Werkstücke orientiert und angehoben werden können. Flachere Werkstücke können nicht in dieser Weise orientiert werden. In diesem Falle können die Greifer 2 und 3 mit Orientierungsstiften versehen sein, die entweder von aussen gegen den Rand des Werkstücks anliegen oder aber in Orientierungslöcher des Werkstücks eingreifen. Solche Orientierungsstifte 9, die der Orientierung des Werkstücks dienen, indem sie von aussen gegen den Flansch 4b anliegen, sind in Figur 1 in strichpunktierten Linien dargestellt. Es könnten aber auch Orientierungsstifte vorgesehen sein, welche beim Anheben des Werkstücks durch die Magnete 6 in Orientierungslöcher desselben eindringen.The illustrated embodiment shows the possibility of how deep-drawn workpieces can be oriented and raised. Flatter workpieces cannot be oriented in this way. In this case, the grippers 2 and 3 can be provided with orientation pins which either lie against the edge of the workpiece from the outside or in Intervene in the orientation holes of the workpiece. Orientation pins 9 of this type, which serve to orient the workpiece by abutting against the flange 4b from the outside, are shown in dash-dotted lines in FIG. Orientation pins could also be provided, however, which penetrate the orientation holes of the workpiece when the workpiece is lifted by the magnets 6.

Claims (6)

Transferanordnung an einer Presse zum schrittweisen Transport von Werkstücken (4) durch Bearbeitungsstationen eines Werkzeuges, mit seitlich des Werkzeuges angeordneten Transportstangen (1), die mit Greifern (2, 3) für Werkstücke (4) besetzt und zyklisch in Längs- und Querrichtung hin- und herbewegbar sind, dadurch gekennzeichnet, dass mindestens ein Teil der Greifer (2, 3) mit Hubmagneten (6) versehen sind, um das Werkstück (4) beim Transport aus einer Bearbeitungsstation zur nächsten anzuheben.Transfer arrangement on a press for the step-by-step transport of workpieces (4) through processing stations of a tool, with transport bars (1) arranged on the side of the tool, which are equipped with grippers (2, 3) for workpieces (4) and cyclically in the longitudinal and transverse directions. and can be moved, characterized in that at least some of the grippers (2, 3) are provided with lifting magnets (6) in order to lift the workpiece (4) during transport from one processing station to the next. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Greifer (2, 3) mit Orientierungsorganen versehen sind, welche beim Anheben durch die Magnete (6) und während des Transports die Lage des Werkstücks (4) mitbestimmen.Arrangement according to claim 1, characterized in that the grippers (2, 3) are provided with orientation elements which also determine the position of the workpiece (4) when they are lifted by the magnets (6) and during transport. Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Greifer (2, 3) V-förmige Orientierungsflächen (5) aufweisen.Arrangement according to claim 2, characterized in that the grippers (2, 3) have V-shaped orientation surfaces (5). Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Greifer (2, 3) Orientierungsstifte (9) aufweisen.Arrangement according to claim 2, characterized in that the grippers (2, 3) have orientation pins (9). Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass mindestens ein Greifer (3) bestimmter Greiferpaare (2, 3) mit einem Anwesenheitssensor (7), z. B. einem Näherungsschalter, versehen ist.Arrangement according to one of claims 1 to 4, characterized in that at least one gripper (3) certain gripper pairs (2, 3) with a presence sensor (7), for. B. a proximity switch is provided. Anordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass starre Greifer (2, 3) fest mit den Transportstangen (1) verbunden sind.Arrangement according to one of claims 1 to 5, characterized in that rigid grippers (2, 3) are firmly connected to the transport rods (1).
EP95810446A 1994-07-29 1995-07-06 Transfer arrangement for presses Expired - Lifetime EP0694350B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2405/94 1994-07-29
CH02405/94A CH688647A5 (en) 1994-07-29 1994-07-29 Transfer arrangement on a press.

Publications (2)

Publication Number Publication Date
EP0694350A1 true EP0694350A1 (en) 1996-01-31
EP0694350B1 EP0694350B1 (en) 1999-03-24

Family

ID=4233026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810446A Expired - Lifetime EP0694350B1 (en) 1994-07-29 1995-07-06 Transfer arrangement for presses

Country Status (7)

Country Link
US (1) US5607281A (en)
EP (1) EP0694350B1 (en)
JP (1) JPH0857562A (en)
CN (1) CN1061602C (en)
CH (1) CH688647A5 (en)
DE (1) DE59505416D1 (en)
TW (1) TW290495B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020305A1 (en) 1998-10-05 2000-04-13 Adval Tech Holding Ag Transferring device on a press
CN109592309A (en) * 2018-11-01 2019-04-09 上海歌通实业有限公司 A kind of ceramic honey comb clamping transmission equipment
WO2020178138A1 (en) 2019-03-01 2020-09-10 Adval Tech Holding Ag Feed apparatus for transfer press

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4483306B2 (en) * 2004-01-16 2010-06-16 トヨタ自動車株式会社 Tandem press machine
US8118197B2 (en) * 2007-06-18 2012-02-21 Precision Valve Corporation Method of making aerosol valve mounting cups and resultant cups
US20090158580A1 (en) * 2007-06-18 2009-06-25 Precision Valve Corporation Method of making aerosol valve mounting cups and resultant cups
US8919839B2 (en) * 2009-09-01 2014-12-30 Sgm Gantry S.P.A. Electromagnetic lifter for moving horizontal-axis coils and the like
CN103411038B (en) * 2013-06-20 2016-01-13 湖州师范学院 A kind of health care water diversion joint

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151735A (en) * 1963-04-08 1964-10-06 Koppy Tool & Die Company Work engaging fingers for transfer mechanism
DE3425066A1 (en) * 1983-07-08 1985-01-24 Kabushiki Kaisha Komatsu Seisakusho, Tokio/Tokyo CONTROL CIRCUIT FOR A TRANSFER DEVICE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040921A (en) * 1958-06-18 1962-06-26 United States Steel Corp Plate handling apparatus
US3754667A (en) * 1972-01-07 1973-08-28 R Storch Transfer mechanism
DE3320830A1 (en) * 1983-06-09 1984-12-13 Hans 4320 Hattingen Schoen Step feed for follow-on tools, in particular on punching presses

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151735A (en) * 1963-04-08 1964-10-06 Koppy Tool & Die Company Work engaging fingers for transfer mechanism
DE3425066A1 (en) * 1983-07-08 1985-01-24 Kabushiki Kaisha Komatsu Seisakusho, Tokio/Tokyo CONTROL CIRCUIT FOR A TRANSFER DEVICE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020305A1 (en) 1998-10-05 2000-04-13 Adval Tech Holding Ag Transferring device on a press
CN109592309A (en) * 2018-11-01 2019-04-09 上海歌通实业有限公司 A kind of ceramic honey comb clamping transmission equipment
CN109592309B (en) * 2018-11-01 2020-10-09 上海歌通实业有限公司 Honeycomb ceramic clamping and conveying equipment
WO2020178138A1 (en) 2019-03-01 2020-09-10 Adval Tech Holding Ag Feed apparatus for transfer press
US11833569B2 (en) 2019-03-01 2023-12-05 Adval Tech Holding Ag Feed apparatus for transfer press

Also Published As

Publication number Publication date
CH688647A5 (en) 1997-12-31
CN1061602C (en) 2001-02-07
TW290495B (en) 1996-11-11
EP0694350B1 (en) 1999-03-24
JPH0857562A (en) 1996-03-05
US5607281A (en) 1997-03-04
CN1124199A (en) 1996-06-12
DE59505416D1 (en) 1999-04-29

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